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Flight Reliability

AA 670 · American Airlines

Miami → Kansas City (MIA–MCI)87% of its flights flew this route. The rest (RSW–PHX, PHX–TPA) are included in these numbers.

58
A Little Dicey
WanderNerd Reliability Score
62%
Arrive within 15 minutes
21 min
Average arrival delay
0.4%
Cancelled
1 min
Median arrival delay

Based on 241 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

AA 670 departing between 3–6 PM arrived on time 94% of the time, versus 57% between 9 PM–12 AM.

Sunday scaries are real for this one.

AA 670 arrived on time 74% of the time on Tuesdays and just 50% on Sundays. That gap is worth planning around.

Lagging the MIA–MCI route.

AA 670 arrived on time 62% of the time, versus 71% across the MIA–MCI route.

Lagging the American Airlines network.

AA 670 arrived on time 62% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon58%(33 flights)
  • Tue74%(31 flights)
  • Wed69%(32 flights)
  • Thu60%(35 flights)
  • Fri60%(37 flights)
  • Sat67%(33 flights)
  • Sun50%(36 flights)
On-time by departure window
  • 3–6 PM94%(17 flights)
  • 6–9 PM65%(76 flights)
  • 9 PM–12 AM57%(144 flights)
On-time trend by month
70%
May

Jun 29% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202529%28
July 202547%30
August 202545%31
September 202580%30
October 202574%31
December 202590%10
February 2026100%12
April 202658%24
May 202670%30
Departures on time
64%
Diverted
1.2%
Flights flown
237
Months covered
12

Same route, other flights

Keep nerding

Based on 241 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.